[Tickets #7851] Re: "Headers already sent" caused by usage of flush()

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Ticket URL: http://bugs.horde.org/ticket/7851
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  Ticket             | 7851
  Updated By         | Valentin.Vidic at CARNet.hr
  Summary            | "Headers already sent" caused by usage of flush()
  Queue              | DIMP
  Version            | 1.1.1
  Type               | Bug
  State              | No Feedback
  Priority           | 2. Medium
  Milestone          |
  Patch              |
  Owners             |
+New Attachment     | dimp_flush.diff
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Valentin.Vidic at CARNet.hr (2010-05-19 09:59) wrote:

I'm also seeing a lot of 'headers already sent in Unknown on line 0'  
in apache error logs. However the manual for flush says:  
http://php.net/manual/en/function.flush.php

flush() may not be able to override the buffering scheme of your web  
server and it has no effect on any client-side buffering in the  
browser. It also doesn't affect PHP's userspace output buffering  
mechanism. This means you will have to call both ob_flush() and  
flush() to flush the ob output buffers if you are using those.

And if I add an ob_flush() call before flush() the error message goes  
away. Patch is attached.